linux-kernel - Re: How to locate struct file * from a bio?

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 31 Jan 2007 19:45:02 +0100 (MET)
From:	Jan Engelhardt <jengelh@...ux01.gwdg.de>
To:	Helge Hafting <helge.hafting@...el.hist.no>
cc:	Eddie Pettis <pettis.eddie@...il.com>, linux-kernel@...r.kernel.org
Subject: Re: How to locate struct file * from a bio?

On Jan 31 2007 16:18, Helge Hafting wrote:
> Eddie Pettis wrote:
>> Longer version:  I am working on a project that requires measuring the
>> popularity of each file in a filesystem.  I have made several attempts
>> to locate all the file reads by grepping for ->readpage() and
>> ->readpages() calls, but I am still missing several file reads.  I
>> have not yet looked for file writes.
>
> Why don't you tap into "open" instead?
> Here you can note who opens the file and if they open it for
> reading or writing.  If you really need the amount of data
> transferred, consider trapping the read and write syscalls too.

And to add the sugar on top: in case you can live without tracing / (root
filesystem), you can write your very own fuse filesystem layer in a few
minutes and trace every small thing. Or perhaps take an existing project
(aufs/unionfs) and enhance the module with some the wanted hooks, etc.

Jan
-- 
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/